Trip to a vet did not help my snake, please help

[Bogertophis]

Yes, he was eating well after I got him started. First was pinkies (petsmarts suggestion) then after a few weeks I moved up to fuzzies and then right before he stopped he had 1 or 2 weeks of "small mice" (all the mice are petsmart arctic mice brand).
Thanks for the info, I thought perhaps offering different temperature mice might help that's why I was doing 3 in a night (one normal temp, slightly cooler, slightly warmer, all thawed in room temp water then warmed up at around 100 degrees before feeding). Sounds like he needs to destress big time, I'll get the substrate removed from his tank tonight and put paper towels down.

Pet stores are well-known for giving lousy advice, & telling you to start a BP on pinkies was totally wrong. "Baby" BPs normally eat at least fuzzies but many are started on hoppers (very young mice with eyes open).* BPs have heat-sensing pits & you can bank on them wanting life-like WARMTH from their prey, if not fed live. Many here have success by blow-drying (briefly) the f/t prey after thawing & immediately before offering, if you continue only offering f/t. (they cool off fast, do this right next to the cage)

*as far as prey, BPs could also be safely** fed live baby rats of a size equal to the mice & it might be worth trying if you can get them, just because some snakes have taste preferences. A rat pink is roughly = to a mouse fuzzy, a rat fuzzy is roughly = to a mouse hopper. **mice or rats with eyes still closed will never bite a snake, they don't fight back until their eyes are open, & even then, hopper mice aren't very skilled yet at self-defense.

As far as hides to make him comfortable now (!) don't wait to order/buy another...you can modify cardboard boxes for the time being...he needs to feel safe & secure. Reptile Basics is one place to get good inexpensive plastic hides, fyi. If you get a hide that's bigger than your snake is now (to grow into) you can make it 'cozy' for him by crumpling some paper & stuffing it inside until he grows bigger...BPs like "back pressure"- feeling snug in hides so that nothing can sneak up behind them.